Oh, I am sure there is a market for something like this. Some people just don't know how to back up trailers. For a good laugh, hang out at the boat landing on a holiday weekend.
This idea may solve a problems for trailer challenged folks. It doesn't seem to offer a lot of room and depending on price, might have a high cubic foot cost to it. To me, it would seem easier to back up your rig to a conventional trailer than go through the aerobics to attach and detach this unit. Still curious how difficult it is to back the truck in and not scratch up the side of the bed.
Seems like it would be very hard on the pulling vehicle's frame when it goes over a bump raising one side and not raising the other. Torsional stress would be a lot for the tow vehicle. Besides its fugly.